China's top drug regulator, health authorities and police on Monday issued a circular calling for a crack down on those involved in the illegal trade of vaccines.
China's health watchdog is worried that a drop in vaccination coverage driven by vaccine safety concerns will offset its achievements in limiting infectious diseases such as hepatitis B and measles.
No link has been found to the vaccines given to nine of the children in China who died after receiving hepatitis B shots, health authorities claim.
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